not able to see the controls values from DB in user control when i am access the user control from page

Question

I have got one user control, I am loading this user control from a parent page when the button clicked ..

In user control I have got one drop downlist and grid view , both data is loading form DB in page load method ......

but in parent page when I click on the button to load the user control, I am able to see only one drop down with no loaded values in it(normally it is loaded with values ) and not able to see the grid view as well ....

and this is my code ..on parent page

 <%@ Page Language="C#" MasterPageFile="~/MasterPages/template.master" AutoEventWireup="true"            CodeFile="ViewCertificateMaster.aspx.cs" Inherits="Pages_ViewCertificateMaster" %>

  <%@ Register Src="../Controls/one.ascx" TagPrefix="uc1" TagName="one" %>

and in code behind file

protected void btnShow_OnClick(object sender, EventArgs e)
{
    int selectedItem = ddlProductType.SelectedIndex;

    switch (selectedItem)
    {
        case 0:

            UserControl myUsrControl = (UserControl)Page.LoadControl("../Controls/one.ascx");
            divViewMyCerts.Controls.Add(myUsrControl);
            divViewMyCerts.Visible = true;

            break;
     ....................
         ..................
      ..................
       code 

in one.ascx code behind file ...

protected void Page_Load(object sender, EventArgs e)
{
    string remoteUser = ((UserInfo)Session["USER_INFO"]).GetUserEmail();
    intAcctId = ((UserInfo)Session["USER_INFO"]).GetUserAcctId();
    objCert = new Certificate();

    if (!IsPostBack)
    {
         .............
         here I am binding the grid view and drop down list values from DB
         ...............
         ...............

Would any one please help on this why I am getting empty dropdown list and not able to see the grid view as well ....

many thanks in advance

Answer 1

Because IsPostBack will be true in Page_Load of the one.ascx. Since the control is being added at btnShow_OnClick event at the page and the IsPostBack is true here. Check the value of IsPostBack in one.ascx in your code.

See the definition of IsPostBack of a user control. Which is

"Summary: Gets a value indicating whether the user control is being loaded in response to a client postback, or if it is being loaded and accessed for the first time.

Returns: true if the user control is being loaded in response to a client postback; otherwise, false."